Fluid handling – Line condition change responsive valves – Direct response valves
Reexamination Certificate
1999-10-21
2001-03-06
Rivell, John (Department: 3753)
Fluid handling
Line condition change responsive valves
Direct response valves
C137S844000, C137S223000
Reexamination Certificate
active
06196260
ABSTRACT:
TECHNICAL FIELD
The present invention relates to inflatable bladders and more particularly, to a valve formed of layers of sheet material for controlling the inflation and deflation of an inflatable bladder.
BACKGROUND OF THE INVENTION
It is known in the art to use inflatable structures for many applications, such as seat cushions, mattresses and medical devices. Many of these structures require that the rate of inflation differ from the rate of deflation of the bladder. Complex mechanical valves are used to control the rate of inflation and deflation of the inflatable structures. In other instances, a pump is used to control the inflation and deflation of these structures.
BRIEF SUMMARY OF THE INVENTION
An exemplary embodiment of the invention is a flow control valve including a first sheet having a hole therein and a second sheet secured to said first sheet at a plurality of separate seal locations along a periphery of the first and second sheets. The seal locations define at least one channel between the seal locations. The second sheet has an aperture therein in fluid communication with the hole and selectively in fluid communication with the channel.
REFERENCES:
patent: 1068167 (1913-07-01), Philblade
patent: 2576637 (1951-11-01), Patriquin
patent: 2816571 (1957-12-01), Pike
patent: 2989073 (1961-06-01), Goodwin
patent: 3722526 (1973-03-01), Henningsson
patent: 3791407 (1974-02-01), Nicholls
patent: 3887213 (1975-06-01), Goetz
patent: 4310013 (1982-01-01), McClaskey
patent: 4552133 (1985-11-01), Kawaguchi
patent: 4633910 (1987-01-01), Sugimura
patent: 4674532 (1987-06-01), Koyanagi
patent: 4708167 (1987-11-01), Koyanagi
patent: 4917646 (1990-04-01), Kieves
patent: 5144708 (1992-09-01), Pekar
patent: 5248275 (1993-09-01), McGrath et al.
patent: 5372487 (1994-12-01), Pekar
patent: 5496262 (1996-03-01), Johnson, Jr. et al.
patent: 4030717 A1 (1992-02-01), None
patent: 1 180 487 (1959-04-01), None
Cantor & Colburn LLP
Dielectrics Industries, Inc.
Rivell John
Schoenfeld Meredith H
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